Short-distance nitrification denitrification nitrogen removal technology control method

Abstract

The invention relates to a short-distance nitrification denitrification nitrogen removal technology control method, aims to improve the nitrogen removal efficiency, save energy consumption, reduce sludge yield and save land occupation area, and is suitable for the treatment of industrial wastewater grossly inadequate in phosphorus content. Influences of phosphorus concentration on nitrosifying bacteria and nitrifying bacteria are different, phosphorus subsaturation coefficient for the nitrifying bacteria is one magnitude order higher than the phosphorus subsaturation coefficient for the nitrosifying bacteria, and the method includes target water quality identification and response and mixed liquid phosphorus concentration control and adjustment processes. Short-distance nitrification denitrification is realized as follows: online testing of a reaction liquid, inputting of analysis results into a system, comparison of phosphorus response schemes, generation of a phosphorus dynamic dosing scheme, and outputting of signals of control I, II and III for regulation of the phosphorus concentration in the reaction liquid. The reaction degree of each stage of a nitrogen removal reaction is controlled by regulation of the phosphorus concentration ratio in the reaction liquid to achieve the purpose of high accumulation of nitrous nitrogen and realize the shortcut nitrification denitrification process.

Description

technical field [0001] The invention relates to the technical field of environmental engineering sewage biological treatment, specifically a short-range nitrification and denitrification technology control method, especially suitable for treating low-phosphorus organic wastewater produced in industrial and agricultural production. Background technique [0002] At present, biological denitrification is one of the most widely used sewage denitrification technologies at home and abroad. The short-cut nitrification and denitrification biological denitrification process is a new type of biological denitrification technology. This technology controls the conversion of nitrogen by changing the denitrification conditions. , the nitrification process stays in the nitrosation stage, forming NO 2 -N accumulates in large quantities, and then directly reduces nitrite nitrogen to N by denitrification 2 . This technology has the advantages of saving energy, reducing sludge production and...

AI Technical Summary

Problems solved by technology

[0004] The traditional theory holds that in the aerobic water treatment system, the demand for phosphorus for the growth of activated sludge microorganisms is generally considered according to BOD5:N:P=100:5:1, but the proportion of nutrients in actual sewage is often extremely unbalanced, and some industries The phosphorus content in wastewater is seriously insufficient, such as beer wastewater, papermaking wastewater and seawater wastewater, etc.

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